[rescue] NTP, time sources, time-nuts - Re: In Realtime: Saving 25, 000 Manuals ??? August 15, 2015

Toby Thain toby at telegraphics.com.au
Fri Aug 21 13:13:24 CDT 2015

On 2015-08-21 12:49 PM, Lionel Peterson wrote:
> I, and I assume others would be interested in having our own time source (for
> me the issue purely for geek points)... I'm interested in anything that can be
> cheaply cobbled together to accomplish that end.
> In related news, there seems very little support for the actual NTP project -
> been reading apocalyptic stories about it's demise these last few years...
> Seems NTP isn't 'sexy enough' to garner any real support, though many projects
> rely, either directly or indirectly on accurate time.

Well, there's this impressive effort:

+ http://phk.freebsd.dk/time/


> Lionel
>> On Aug 21, 2015, at 12:04 PM, Bob Darlington <rdarlington at gmail.com> wrote:
>> Yes, we do have discussions on that but ultimately that's probably a
>> project for the ntp oriented groups.
>> I'm designing a cape for a beaglebone black around a Furuno gps timing
>> receiver in order to replace a commercially available ($3000) NTP
>> appliance.  So far I'm out about $100 including the beaglebone.  The gps
>> receiver, brand new, is $35.  Ping me off list and I'll give you all the
>> details you want.
>> Here's some random stats for a 24 hour period that I bothered to graph:
>> http://www.nerdhouse.org/ntp/
>> time-nuts is much more interested in the science and art of characterizing
>> performance of oscillators, precision time interval measurements,
>> statistics, and the like.  Most of us care about what time it is
>> (wristwatch time) but that's a minor interest.  It's all about squeaking
>> out the best performance of cesium beams, rubidum clocks, and quartz
>> oscillators for stability.
>> -Bob
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